The registration address of hebei shincheng and science and technology ltd. Is located at gacai and city 4-2-804, nakayama road, hebei province, with registration as the changan district market supervisory authority, with legal representatives wu yulong operating in the fields of computer software and hardware development, technical advice, technology transfer and installation; computer system integration; integrated wiring; installation of surveillance equipment; data processing and storage services; design, production, proxy domestic advertising operations; issuance of domestic advertising services for domestic and external advertising operations; electrical engineering, mine-proofing works; stationery, office supplies, teaching equipment, laboratory equipment, sound equipment, instrumentation forms, construction materials, fire protection equipment, photographic equipment, handicrafts (except for antique painting), electronics, electrical appliances, chemical test agents (except ...